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| Main Authors: | , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2017
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| Online Access: | https://doi.org/10.1594/PANGAEA.885432 |
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| _version_ | 1867172337563992064 |
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| author | Xiao, Xiaotong Zhao, Meixun Knudsen, Karen Luise Sha, Longbin Eiriksson, Jón Gudmundsdóttir, Esther Ruth Jiang, Hui Guo, Zhigang |
| author_facet | Xiao, Xiaotong Zhao, Meixun Knudsen, Karen Luise Sha, Longbin Eiriksson, Jón Gudmundsdóttir, Esther Ruth Jiang, Hui Guo, Zhigang |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We present a sea-ice record back to 15 ka (cal. ka BP) based on the sea-ice biomarker IP25, phytoplankton biomarker brassicasterol and terrestrial biomarker long-chain n-alkanols in piston core MD99-2272 from the North Icelandic shelf. During the Bølling/Allerød (14.7-12.9 ka), the North Icelandic shelf was characterized by extensive spring sea-ice cover linked to reduced flow of warm Atlantic Water and dominant Polar water influence, as well as strong meltwater input in the area. This pattern showed an anti-phase relationship with the ice-free/less ice conditions in marginal areas of the eastern Nordic Seas, where the Atlantic Water inflow was strong, and contributed to an enhanced deep-water formation. Prolonged sea-ice cover with occasional occurrence of seasonal sea ice prevailed during the Younger Dryas (12.9-11.7 ka) interrupted by a brief interval of enhanced Irminger Current and deposition of the Vedde Ash, as opposed to abruptly increased sea-ice conditions in the eastern Nordic Seas. The seasonal sea ice decreased gradually from the Younger Dryas to the onset of the Holocene corresponding to increasing insolation. Ice-free conditions and sea surface warming were observed for the Early Holocene, followed by expansion of sea ice during the Mid-Holocene. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_885432 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Biomarker records in sediment core MD99-2272 from North of Iceland Shelf Xiao, Xiaotong Zhao, Meixun Knudsen, Karen Luise Sha, Longbin Eiriksson, Jón Gudmundsdóttir, Esther Ruth Jiang, Hui Guo, Zhigang 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit sediment mass; 5<56>Fr; AGE; CALYPSO; Calypso Corer; DEPTH, sediment/rock; IMAGES V; Marion Dufresne (1995); MD114; MD99-2272; n-Alkanol long chain alcohols C26+C28+C30, per unit sediment mass; North Icelandic Shelf; Phytoplankton biomarker Brassicasterol IP25 index We present a sea-ice record back to 15 ka (cal. ka BP) based on the sea-ice biomarker IP25, phytoplankton biomarker brassicasterol and terrestrial biomarker long-chain n-alkanols in piston core MD99-2272 from the North Icelandic shelf. During the Bølling/Allerød (14.7-12.9 ka), the North Icelandic shelf was characterized by extensive spring sea-ice cover linked to reduced flow of warm Atlantic Water and dominant Polar water influence, as well as strong meltwater input in the area. This pattern showed an anti-phase relationship with the ice-free/less ice conditions in marginal areas of the eastern Nordic Seas, where the Atlantic Water inflow was strong, and contributed to an enhanced deep-water formation. Prolonged sea-ice cover with occasional occurrence of seasonal sea ice prevailed during the Younger Dryas (12.9-11.7 ka) interrupted by a brief interval of enhanced Irminger Current and deposition of the Vedde Ash, as opposed to abruptly increased sea-ice conditions in the eastern Nordic Seas. The seasonal sea ice decreased gradually from the Younger Dryas to the onset of the Holocene corresponding to increasing insolation. Ice-free conditions and sea surface warming were observed for the Early Holocene, followed by expansion of sea ice during the Mid-Holocene. |
| title | Biomarker records in sediment core MD99-2272 from North of Iceland Shelf |
| topic | 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit sediment mass; 5<56>Fr; AGE; CALYPSO; Calypso Corer; DEPTH, sediment/rock; IMAGES V; Marion Dufresne (1995); MD114; MD99-2272; n-Alkanol long chain alcohols C26+C28+C30, per unit sediment mass; North Icelandic Shelf; Phytoplankton biomarker Brassicasterol IP25 index |
| url | https://doi.org/10.1594/PANGAEA.885432 |